How to Cure an Ear Infection Naturally in Just 1 Day! <br /> <br />Ear infection can be caused by bacteria or viruses in the middle ear and is more common in children then adults. <br /> <br />The most common signs include: pain in the ear, tugging at the ear, difficulty sleeping, headache, poor response to sounds, high fever, fluid draining from the ear, vomiting, diarrhea etc.